Trees in urban areas must deal with challenges rarely found in nature. Due to nearby construction and paving, trees often find themselves growing in unnatural surroundings. Soils are compacted by construction, roots are severed for foundations, sidewalks and roadways. Open land that would absorb water to naturally irrigate and fertilize trees is often made “impervious” by this construction or paving activity. To counteract these urban challenges, it is important to provide adequate water and nutrients to the root zones of our trees.